Expansion-bolt.



H. G. OSBORNE.

EXPANSION BoL'T.

APPLICATION FILED JULY l 19l3.

1,139,71 2@ Patented 1135118, 1915.

lTHE NORRIS PETERS cil, PHDTO'LITHCL, WASHINGTON, n. C

onirica.

HENRY e. osBoRNE, or BROOKLYN, NEW YORK.

. EXPANSION-Bom.

insana.

Specification of Letters Patent.

Patented May 18, 1915.

Y Application :filed July 1, 1913'. Serial No. 776,746.

To all 'whom t may concern:

Be it known thatI, HENRY G.' OsBoRNmia ycitizen of the United States,anda resident of Brooklyn, in kthe county of Kings and State of New York, have invented certain new and useful Improvements in Expansion-Bolts, of which the following is a speciication.

My invention relates to expansion anchors for machinebolts. i Y.

The objects are, to provide an anchor for lmachine bolts which will havey parallel eX- companying drawing, in which like numbers Y Vrepresent like parts, and in which:

Figure 1 is a side elevation of my improved expansion anchor. Fig. 2 shows a section of a wall with a holefin which the anchor is partially expanded, the anchor being shown in side elevation, with a portion of the bridle framebroken away. Fig; 3 shows the anchor expandedk in a hole in a wall by a bolt which also clamps a bracket. A portion of the bridle frame being shown by dotted lines. Fig. I shows the anchor in longitudinal section, expandedy in a hole by a bolt, a piece of work being `clamped under .they head of the bolt.; the bolt beingshown in elevation. Fig. 5 is a view of the outer end of the anchor, with thebolt cut away through line 5-5 yof Fig. 4:. Fig. 6 is a perspective ,view of the bridleframdthe sides `of which partiallyenvelop` the other memybers of the anchor when the anchor is assenti'` bled. Fig. 7 is a longitudinal sectional view` of` they wedge collar.y Mig. 8 is aisectional view; through ylineyS'B,.ofiFig. 3.v f n In the construction of my expansionbolt I use a machine bolt 10, of ordinary ycon-V struction, having screw threads at the for- Y ward end and an enlarged head 11 at the rear end. A nut 12, preferably cylindrical in form', is provided for engagement with the threads of the bolt. The nut is formed with'lugs 13-,13 projecting beyond the body portion at the forward end, the rear end 1s cut away to form a wedge with sides lll-14.

A collar 15 is made which slips freely over f the bolt and the forward end is formed as a wedge having the sides 16-16. The collar is provided'with internal longitudinal recesses 17-.17 into which the hooked ends of the bridle frame t. Shell members 18-18 Vare'formed of half sections of tubes, with portions of the abutting faces cut away to form contact surfaces 19 for engagement with the wedges.` A. bridle frame 2O is provided having a narrow central transverse portion 21 which passes over the forward end of the nut between the lugs 13-13, and v having lparallell sides 22-22, Vcurvilinear in form, whichpartially envelop the vshells 18-18'and Vprevent the shells from separating until they are forced apart by the wedges. Thesides of the bridle frame are narrowed downV` and bent to form hooks 23-28 at theirj free ends. The hooked ends 23-23 fit into the recesses 17 -17 of the col-V lar holding it in place when the anchor is assembled and' also causing the collartobe drawn toward the nut as the end of the bolt forces the bridle frame forward.

In the drawing the bridle frame is shown;

relatively thin, as being stamped from sheet' metal, although it may be made otherwise, y .y a f or strengthened by reinforcement. 1 f

When it is desired to fasten any object to.y Y a wall of stone, brick or the likepwith my expansion bolt, the expansionfanchor is inserted in a hole 24, drilled Vina wall *25,y and is pushed forward until the lugs4 1'3-13 f v strike the bottom of .the':hole,'the nut is then prevented from further forwardl movement. y If the pressure is continued 'against the yrear ofthe anchor the collariwill move forward; i

' Thejanchor "may be expanded in the holey the tapered sides 16-16 of the collar Will act against the contact surfaces 19-119 on4 the adjacent sides of the shells 18V-18 to separate and move the yshells forward at the same time. In moving'forwardftheshells are vcaused to separate also by thetapered faces 111-14 of the nut. As the Wedge faces Yon the nut and collarare of the same"V angle Vthe actionY of broth Will be equal, andlthei.

separation of the shells Will be uniform.

The shells in separating act to .eXpand'the sides 22-22 of the bridle frame, as clearly illustrated in Fig. 8 of the drawing, resulting in parallel expansion of the anchor in four Yradialdirections.

` jsuliiciently to prevent it from turning as the bolt is beingsereyved into the nut. With the 'I fastened and is'vinserted in the expansionr anchorrin place in the'hole the bolt 10 is passed through a holein the object 26 to be anchor. As the threads of the bolt are screwedvintothe nut the bolt advancesuntil the bolt head draws the Work against the face of the Wall, further turning of thebolt` tendsy to kdravv the anchor outwardly, this is checked as soon YasY the end of the bolt passes through the nutv and strikes the transverse -portion 21 of Athe bridle frame, from that 30`V time-on turning the boltdraws the nut 12 andthe collar 15 toWardeach other, andthe,

Wedges on each exert` greatpressure to eX- pand the anchor against the sides of the hole. VVhenthenutY and "collar are being drawn toward each other, as previously eX- V vplained, the bolt moves inwardlyfat the y'samerate thatthe collar and bridle frame Y do, until the 'bolthead 'isl exerting'the maximum pressure on the ,objectvheld against thel 40y Wall; beyond this point tightening upton the bolt vvill draw thenuttovvard 'the bolt head I f and 'the shells '1S-18 willbefvve'dgedjback- Ward against the'collarand outward against the sidesofthe `hole,.eXpanding the sides of the bridle frame at the same time. 'The for- Ward travel ofthe bolt is not checked Vas soon as the shells grip the sides of theho'le, there being a margin of travel beyond that which o permits thebolt head to iirmly clamp the Work against the face of the Wall. x

y The lugs 13-13 are Vavaluable feature of Y my device as they provide the space ybetween the front ofthe nut and the bottom of the holevvhich furnishes clearance for the-end V- ofthe bolt to pass beyond the threaded portion of the nut, -Without strikingl thebottom of the hole, when the anchor is pushed'into the hole AYto the bottom.

.g lHaving `describedmy inventiomvvvhat ylf claim asnew, and' desire to secure 4by Let-V ters-Patent, isi;y Y* i* I Y f i1.'k The-*Combination aiexpanslgabbit of, a tapered nut, a taperedcollar, expansible members engaged by said nut and collar, a longitudinally extending bridle frame yadaptedto hold the anchor parts assembled relation, yand a bolt coactingwith the nut and bridle frame to eXpand'the anchor V,on parallel lines, said bridle frame being engagedfwith' said collar and adapted on the screwing inwardly of the bolt to force said collar between the rear ends ofsaid expansinble members. f

v2.l rllhe combination in an expansionV bolt of, a tapered-nut, a tapered collar, a'bolt,

separable shell members adapted to beeX- Vpanded by the said'nut and collar, and a bridle frame having a transverseportior. for engagement with the end vofy the bolt and sidejportions adapted to be expanded by the shell members as ysaid shell members are.

separated' by the nutand collar. v y

3. The combination in an expansion bolt of, a threaded bolt, a vWedge shapedcollar loosely mounted on the bolt, a Wedgeshaped nut for engagement with the' threaded portion of said bolt, lugs projecting forward of the body po'rtionofy said nut for abutment against the bottom of the holeshell mem' bersl adapted to kbeseparated by said collar and nut, Vand ya bridle frame having anarrow central ytransverse portlon :for engagement with the forward end -of the bolt, kparallel curvilinear sides Y partiallyv YVenveloping vand adapted .to be `separated by the* shell members, the free ends of said bridle frame forming hooks for engagement With thefvvedge collar. Y Y 'J f' L Y 4:. The combination 1n an 'expansion bolt of,a nut, a collar, shell members coactingf with said nutand'collar, a bridle frame havfing a centraltransverse portion for engage- Vment vvith therendlof a bolt, side members terminating in hooks foren'gagement'with the boltladvances. l

the'collar, and'm'eans to expand the shells as Y' r5.7'1he combination in an-eXpansion bolt of, apluralitv of expansible members'adapted toV be expanded by Wedges, a bridle-frame coacting with the end of a bolt and a nut',

and'means permittingl the bolt' to advanceV VWith respect to the eXpansible members. as the anchor is expanded. f a v o n 6. The combination in anl expansion bolt` of, a bolt,a tapered fnut, a ytaperedv collar,

shell membersjhaving portions of their abutting lfaces tapered, `a frame member parframe member` having curvilinear sides dapted lto be lexpanded by the shellmem-Y ers. l 1 i 7; The. combmationinfan; expansion bolt of, a :threaded bolt, a, Wedge nutfor engagel ment With. Ythe forvva'rd end ojfgysfa'id bolt, Va

A,tially enveloping the other members, said kiao wedge collar tting loosely over the bolt, expansible members coacting with said nut and collar, and a bridle frame engaging the collar, said bridle frame coectingy with the bolt to draw the nut and vcolla-r together to expend the said expansible members, and said nut having a, projection forward ofr said expansible members to abut against the bottom of the hole t0 prevent further forward 10 movement of the nut and to cause said nut to separate the forward ends of the expansible members as they are advanced. y

Signed at New York city, in the county of New York and State oNew York, this 30thv Witnesses:

ARTHUR MARION, Crus. C. GILL.

Copies of this patent may be obtained for ve cents each, by addressing the G'ommissioner of Patents,

Washington, D. C. 

